diff options
author | Duncan Laurie <dlaurie@chromium.org> | 2014-04-30 16:36:13 -0700 |
---|---|---|
committer | Marc Jones <marc.jones@se-eng.com> | 2014-10-22 03:36:44 +0200 |
commit | c88c54c667124851eb82c5271536fd0f4ad6616c (patch) | |
tree | 1b52b6be3bcca26ba698256f8ad55435b5904d49 /src/soc/intel/broadwell/pcie.c | |
parent | f0aaa29989f4de7258430715d64c6d465fb0c457 (diff) |
broadwell: add new intel SOC
broadwell: Import files from haswell/lynxpoint into soc/broadwell
Reviewed-on: https://chromium-review.googlesource.com/198425
(cherry picked from commit 178400e5709d676dd41e6a75df06faa829e0e3af)
broadwell: Unify and clean up license
Reviewed-on: https://chromium-review.googlesource.com/198426
(cherry picked from commit 30d3c25a0abc76be68477c39a654b95a5975f55d)
broadwell: pch.h: split PM into new header
Reviewed-on: https://chromium-review.googlesource.com/198427
(cherry picked from commit 97a8d0b051f476d0edc06301f57326a718df1373)
broadwell: pch.h: split RCBA into new header
Reviewed-on: https://chromium-review.googlesource.com/198428
(cherry picked from commit fa217361b28fdb8d3a3e85f070dfaf13c0d48135)
broadwell: pch.h: split SATA into new header
Reviewed-on: https://chromium-review.googlesource.com/198429
(cherry picked from commit bf8795ca92f9f0467e7869c701038abb4529ac71)
broadwell: pch.h: split SPI into new header
Reviewed-on: https://chromium-review.googlesource.com/198550
(cherry picked from commit 099af14676a2654ca3e24e66d7b9f0b4ab13cd14)
broadwell: pch.h: split SerialIO into new header
Reviewed-on: https://chromium-review.googlesource.com/198551
(cherry picked from commit 4f3c028686aed78fb07b8792dcf46aebd2268ea6)
broadwell: pch.h: split LPC into new header
Reviewed-on: https://chromium-review.googlesource.com/198552
(cherry picked from commit 10bad5bbb6739c0277fd5330d26a89d60fd5c102)
broadwell: pch.h: split GPIO into new header and clean up
Reviewed-on: https://chromium-review.googlesource.com/198553
(cherry picked from commit 9c97532460562215b78e10b011a29e092a07f3e5)
broadwell: pch.h: split USB into new headers
Reviewed-on: https://chromium-review.googlesource.com/198554
(cherry picked from commit 86ef1a45a2e5f307467b3be48e377569f37b3068)
broadwell: Split IOBP into separate files
Reviewed-on: https://chromium-review.googlesource.com/198734
(cherry picked from commit f93b8bda71728f1383937ad675d2d5fb5a927600)
broadwell: smbus: Extract common code and split header
Reviewed-on: https://chromium-review.googlesource.com/198735
(cherry picked from commit 8052030a9d6b22e8a19938fa9b93e90d08f0057d)
broadwell: Create iomap.h header with platform base addresses
Reviewed-on: https://chromium-review.googlesource.com/198736
(cherry picked from commit b35947d070b28871637dfe2b930a9f2be80958ee)
broadwell: Add header for platform PCI devices
Reviewed-on: https://chromium-review.googlesource.com/198737
(cherry picked from commit 6ac4e56db6e489bb9eaf91a0c3c543399f691500)
broadwell: Split SMM related defines/prototypes to new header
Reviewed-on: https://chromium-review.googlesource.com/198738
(cherry picked from commit 2a2595067077cd918bfd48cad79a684b8e1ff0f4)
broadwell: cpu.h: Split MSR defines to separate header
Reviewed-on: https://chromium-review.googlesource.com/198739
(cherry picked from commit 01148cd2c9edd97cd0c8ef3cfed58bc8c33eb805)
broadwell: Create romstage header file
Reviewed-on: https://chromium-review.googlesource.com/198740
(cherry picked from commit 31c91e811b9e07e7bcba6b9f8f5720a31322eb21)
broadwell: Create ram stage header file
Reviewed-on: https://chromium-review.googlesource.com/198741
(cherry picked from commit 93dde85f98d43d4a1886b59004d1bab4924ad621)
broadwell: Add reference code data interface
Reviewed-on: https://chromium-review.googlesource.com/198743
(cherry picked from commit 9059b8e2308892a48c838c3099404c9cf450df95)
broadwell: Clean up ACPI NVS region
Reviewed-on: https://chromium-review.googlesource.com/198897
(cherry picked from commit d83cc82c36661556eb1e2e437b7ac51d5b8e4a14)
broadwell: Move CTDP ACPI methods to new file
Reviewed-on: https://chromium-review.googlesource.com/198898
(cherry picked from commit fc1e711290df304d18c558d697eea8a5e57061b2)
broadwell: Split EHCI and XHCI ACPI devices
Reviewed-on: https://chromium-review.googlesource.com/198899
(cherry picked from commit 26f437b27e00dbd5c92ea22e76404633a62fb7ca)
broadwell: ACPI: Clean up SerialIO ACPI code
Reviewed-on: https://chromium-review.googlesource.com/198910
(cherry picked from commit ea3cd39566c1bb2ead463a6253b6204a62545d35)
broadwell: ACPI: Remove special handling of LPT-LP chipset
Reviewed-on: https://chromium-review.googlesource.com/198911
(cherry picked from commit 2c54df159bf6759c8f866628e83541de6f4e28f6)
broadwell: ACPI: Clean up use of base address defines
Reviewed-on: https://chromium-review.googlesource.com/198912
(cherry picked from commit 34e4788955bceff01631fd0b4dbf0aa24cf56b75)
broadwell: ACPI: Clean up and fix formatting
Reviewed-on: https://chromium-review.googlesource.com/198913
(cherry picked from commit bc0f7c6d2f95681eb987bb6ff6baf2d16cc77050)
broadwell: Add header for ACPI defines and prototypes
Reviewed-on: https://chromium-review.googlesource.com/198914
(cherry picked from commit 9951e7931942d2921f92f6e094b1cc32c190eab9)
broadwell: Add reset_system function and header
Reviewed-on: https://chromium-review.googlesource.com/198915
(cherry picked from commit 6d1efb94bd39bcd6f7e3e0de2f3299a384b109ef)
broadwell: Move PCODE MMIO defines to systemagent.h
Reviewed-on: https://chromium-review.googlesource.com/198916
(cherry picked from commit abb5f87e548fbde3a08e14a18714b4e4391c955f)
broadwell: Unify chip.h and add chip.c
Reviewed-on: https://chromium-review.googlesource.com/198917
(cherry picked from commit a9c2d7ff3afa1e2a10be85ccc72b7db0f2aaafe1)
broadwell: Rename HASWELL_BCLK to CPU_BCLK
Reviewed-on: https://chromium-review.googlesource.com/198918
(cherry picked from commit 65ac1a07abaf14eb42fec6c5df67d2d3688ad5a1)
broadwell: Clean up broadwell/cpu.h
Reviewed-on: https://chromium-review.googlesource.com/198919
(cherry picked from commit 17353803babc8ace279e105c012130678226144e)
broadwell: Clean up broadwell/systemagent.h
Reviewed-on: https://chromium-review.googlesource.com/198920
(cherry picked from commit 49d7a023f3ff04a65d16622aa9b2fa6004b693ae)
broadwell: Clean up broadwell/pch.h
Reviewed-on: https://chromium-review.googlesource.com/198921
(cherry picked from commit 17da652b4408a91fcfea99dd35fe9f9e1bdcf03b)
broadwell: Clean up management engine driver
Reviewed-on: https://chromium-review.googlesource.com/198922
(cherry picked from commit 4fce5fbb56dc4f31b77e5ada05463c043ad5be72)
broadwell: Add common CPUID and PCI Device ID defines
Reviewed-on: https://chromium-review.googlesource.com/198923
(cherry picked from commit c6bf20309f33168ea2cc4634cbda5ec242824ba8)
broadwell: Clean up and expand report_platform
Reviewed-on: https://chromium-review.googlesource.com/198924
(cherry picked from commit 5082d4824db149e867a2cd8be34c932b03754022)
broadwell: Clean up the bootblock code
Reviewed-on: https://chromium-review.googlesource.com/198925
(cherry picked from commit ba0206ab76fe0b6834a14dc57f400d139094623c)
broadwell: Clean up ramstage device and driver operations
Reviewed-on: https://chromium-review.googlesource.com/199180
(cherry picked from commit d8fc9daf129738713a5059286b7ead004f3b7569)
broadwell: Clean up XHCI and EHCI ramstage drivers
Reviewed-on: https://chromium-review.googlesource.com/199181
(cherry picked from commit d355247333a828a146ce7cf9b92a63da74119c1d)
broadwell: Clean up gpio handling code
Reviewed-on: https://chromium-review.googlesource.com/199182
(cherry picked from commit d62cef1970fe75f8166315016b3d8415cddcab20)
broadwell: Clean up the PCH generic code
Reviewed-on: https://chromium-review.googlesource.com/199183
(cherry picked from commit 3b93b3ea79965d5ac831bf9015e49330f157b0ff)
broadwell: Move get_top_of_ram() and cbmem_top() to memmap.c
Reviewed-on: https://chromium-review.googlesource.com/199184
(cherry picked from commit 68955ba4ff8b49ff466d7badaa934bd143026ba7)
broadwell: Clean up pmutil.c
Reviewed-on: https://chromium-review.googlesource.com/199185
(cherry picked from commit b6fb672ae879e17422f7449f70c3669055096f84)
broadwell: pmutil: Add new acpi_sci_irq() function
Reviewed-on: https://chromium-review.googlesource.com/199186
(cherry picked from commit 80ad8bb9bdc75f180e667861fed42a3844226bc5)
broadwell: Clean up HDA ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199187
(cherry picked from commit b4962acd706eaa66c1c3ef4d22eba313642fbb2d)
broadwell: Clean up cache_as_ram assembly
Reviewed-on: https://chromium-review.googlesource.com/199188
(cherry picked from commit 8a457b82610b604ae7f69e2500815ce411c2d02d)
broadwell: romstage: Separate stack helper functions
Reviewed-on: https://chromium-review.googlesource.com/199189
(cherry picked from commit c220383c90466fc2dbf4b6107679b08ecb4aadad)
broadwell: Add function to read WPSR from SPI
Reviewed-on: https://chromium-review.googlesource.com/199190
(cherry picked from commit 935404da1157d606b913eff6c2635ae898e9980a)
broadwell: Clean up SMBUS code in romstage and ramstage
Reviewed-on: https://chromium-review.googlesource.com/199191
(cherry picked from commit 6ae9d93c1a6f14da6429a4e5b01619c9ccaefdaa)
broadwell: SPI: Clean up romstage and ramstage code
Reviewed-on: https://chromium-review.googlesource.com/199192
(cherry picked from commit 28ffd71a416aee2ab54bc5d782cfeef31d4d30bf)
broadwell: Clean up PCIe root port ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199193
(cherry picked from commit 781f3a1b72c72f0bb05f5524edec471ad13ec90e)
broadwell: Clean up minihd ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199194
(cherry picked from commit a52d275e41fdcbf9895d07350725609d9be1ff0e)
broadwell: Update romstage main to follow baytrail format
Reviewed-on: https://chromium-review.googlesource.com/199361
(cherry picked from commit 0678c739af84c871922ffba5594132b25e471ddd)
broadwell: Add CPU set_max_freq function for romstage
Reviewed-on: https://chromium-review.googlesource.com/199362
(cherry picked from commit 68b0122472af27f38502d42a8a6c80678ddbbba6)
broadwell: romstage: Add chipset_power_state implementation
Reviewed-on: https://chromium-review.googlesource.com/199363
(cherry picked from commit 761cec3b6bb9bde579c3214f3f1196f65700757c)
broadwell: romstage: Convert systemagent init to reg_script
Reviewed-on: https://chromium-review.googlesource.com/199364
(cherry picked from commit c2ea2d3a0c7555a353fb9a1d4a63e773ac8961b2)
broadwell: romstage: Convert pch init to reg_script
Reviewed-on: https://chromium-review.googlesource.com/199365
(cherry picked from commit 4383de5846e97ca5aee6dd210459d8dba0af981c)
broadwell: elog: Use chipset_power_state for events
Reviewed-on: https://chromium-review.googlesource.com/199366
(cherry picked from commit 0ef5961ebe3a7037d5fbe361fbc70a87ac2edad9)
broadwell: Clean up SATA ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199367
(cherry picked from commit ffa5743f74551bd48aa7e5445ce7cd9dc7b07ce8)
broadwell: Update ramstage graphics driver to support broadwell
Reviewed-on: https://chromium-review.googlesource.com/199368
(cherry picked from commit bb01deb8bbed56f15e1143504e4cf012ecf5a281)
broadwell: Update raminit to follow baytrail layout
Reviewed-on: https://chromium-review.googlesource.com/199369
(cherry picked from commit 3f25c23dc58f85d2521916cd6edbe9deeeb8d523)
broadwell: Update and unify the finalize steps
Reviewed-on: https://chromium-review.googlesource.com/199390
(cherry picked from commit ddc4c116b42d38dfdfc45ef4388fbfab32ca48fa)
broadwell: Clean up SMM code
Reviewed-on: https://chromium-review.googlesource.com/199391
(cherry picked from commit 8295e56c9b643fd4b9267d70b5efd0cf94dd67dd)
broadwell: Clean up LPC ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199392
(cherry picked from commit 28326aeaaf304c9262866588d91b79b37d1d9a2e)
broadwell: Clean up systemagent ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199393
(cherry picked from commit 749988fff07eab8d2c9ebc731e3ed9e427b3f7b3)
broadwell: Move C-state configuration information to acpi.c
Reviewed-on: https://chromium-review.googlesource.com/199394
(cherry picked from commit 198a3cd5cbd009be406298cbb53163f075fe9990)
broadwell: Clean up CPU ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199395
(cherry picked from commit 8159689bba479bab6fd2e949e3e1c3f817088969)
broadwell: Do not reserve SMM relocation region
Reviewed-on: https://chromium-review.googlesource.com/199402
(cherry picked from commit e2ab52340e3d3a97a3f8dbdad8fac9f7769d1b4c)
broadwell: Add an early ramstage driver
Reviewed-on: https://chromium-review.googlesource.com/199403
(cherry picked from commit c7a8c867101b49a7f9f17ec1a8777a8db145f3e3)
broadwell: Support for second reference code binary
Reviewed-on: https://chromium-review.googlesource.com/199404
(cherry picked from commit abb99b36e97c4f739b23abed6146fea370bbbec2)
broadwell: Clean up serialio init code
Reviewed-on: https://chromium-review.googlesource.com/199405
(cherry picked from commit e09a1f8520a7b72451a1e2068b200f7c5451f489)
broadwell: acpi: Add function to fill out FADT
Reviewed-on: https://chromium-review.googlesource.com/199406
(cherry picked from commit 7e58f43e46d4382cf4541057f81fe6be3e4d6e74)
broadwell: Update C-state table creation
Reviewed-on: https://chromium-review.googlesource.com/199407
(cherry picked from commit 68b1f70e32e1d0c6fc4332dce402ad78334e0063)
broadwell: acpi: Clean up acpi table creation code
Reviewed-on: https://chromium-review.googlesource.com/199408
(cherry picked from commit 49088b312b159bb17a9330eda6a88d6f324ea146)
broadwell: acpi: Add ACPI table create helper functions
Reviewed-on: https://chromium-review.googlesource.com/199409
(cherry picked from commit 344c3c511d0341457525ef4d6eb70201404fc62c)
broadwell: Add soc/intel/broadwell Makefiles
Reviewed-on: https://chromium-review.googlesource.com/199410
(cherry picked from commit ea8f97738eadd3b0b6a642754df7a7d22e547ffc)
broadwell: Add Kconfig for broadwell soc
Reviewed-on: https://chromium-review.googlesource.com/199411
(cherry picked from commit 8c99038a5c20812497619134c66d45bc4f21c8fe)
Squashed 78 commits for broadwell that form a solid code base.
Change-Id: I365ca9a45978b5e0cc5237f884e20a44f62a0e63
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6964
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Diffstat (limited to 'src/soc/intel/broadwell/pcie.c')
-rw-r--r-- | src/soc/intel/broadwell/pcie.c | 632 |
1 files changed, 632 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/pcie.c b/src/soc/intel/broadwell/pcie.c new file mode 100644 index 0000000000..a407f3c686 --- /dev/null +++ b/src/soc/intel/broadwell/pcie.c @@ -0,0 +1,632 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2014 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pciexp.h> +#include <device/pci_def.h> +#include <device/pci_ids.h> +#include <broadwell/gpio.h> +#include <broadwell/lpc.h> +#include <broadwell/iobp.h> +#include <broadwell/pch.h> +#include <broadwell/pci_devs.h> +#include <broadwell/rcba.h> +#include <chip.h> + +static void pcie_update_cfg8(device_t dev, int reg, u8 mask, u8 or); +static void pcie_update_cfg(device_t dev, int reg, u32 mask, u32 or); + +/* Low Power variant has 6 root ports. */ +#define NUM_ROOT_PORTS 6 + +struct root_port_config { + /* RPFN is a write-once register so keep a copy until it is written */ + u32 orig_rpfn; + u32 new_rpfn; + u32 pin_ownership; + u32 strpfusecfg1; + u32 strpfusecfg2; + u32 strpfusecfg3; + u32 b0d28f0_32c; + u32 b0d28f4_32c; + u32 b0d28f5_32c; + int coalesce; + int gbe_port; + int num_ports; + device_t ports[NUM_ROOT_PORTS]; +}; + +static struct root_port_config rpc; + +static inline int root_port_is_first(device_t dev) +{ + return PCI_FUNC(dev->path.pci.devfn) == 0; +} + +static inline int root_port_is_last(device_t dev) +{ + return PCI_FUNC(dev->path.pci.devfn) == (rpc.num_ports - 1); +} + +/* Root ports are numbered 1..N in the documentation. */ +static inline int root_port_number(device_t dev) +{ + return PCI_FUNC(dev->path.pci.devfn) + 1; +} + +static void root_port_config_update_gbe_port(void) +{ + /* Is the Gbe Port enabled? */ + if (!((rpc.strpfusecfg1 >> 19) & 1)) + return; + + switch ((rpc.strpfusecfg1 >> 16) & 0x7) { + case 0: + rpc.gbe_port = 3; + break; + case 1: + rpc.gbe_port = 4; + break; + case 2: + case 3: + case 4: + case 5: + /* Lanes 0-4 of Root Port 5. */ + rpc.gbe_port = 5; + break; + default: + printk(BIOS_DEBUG, "Invalid GbE Port Selection.\n"); + } +} + +static void root_port_init_config(device_t dev) +{ + int rp; + + if (root_port_is_first(dev)) { + rpc.orig_rpfn = RCBA32(RPFN); + rpc.new_rpfn = rpc.orig_rpfn; + rpc.num_ports = NUM_ROOT_PORTS; + rpc.gbe_port = -1; + + rpc.pin_ownership = pci_read_config32(dev, 0x410); + root_port_config_update_gbe_port(); + + if (dev->chip_info != NULL) { + config_t *config = dev->chip_info; + rpc.coalesce = config->pcie_port_coalesce; + } + } + + rp = root_port_number(dev); + if (rp > rpc.num_ports) { + printk(BIOS_ERR, "Found Root Port %d, expecting %d\n", + rp, rpc.num_ports); + return; + } + + /* Read the fuse configuration and pin ownership. */ + switch (rp) { + case 1: + rpc.strpfusecfg1 = pci_read_config32(dev, 0xfc); + rpc.b0d28f0_32c = pci_read_config32(dev, 0x32c); + break; + case 5: + rpc.strpfusecfg2 = pci_read_config32(dev, 0xfc); + rpc.b0d28f4_32c = pci_read_config32(dev, 0x32c); + break; + case 6: + rpc.b0d28f5_32c = pci_read_config32(dev, 0x32c); + rpc.strpfusecfg3 = pci_read_config32(dev, 0xfc); + break; + default: + break; + } + + /* Cache pci device. */ + rpc.ports[rp - 1] = dev; +} + +/* Update devicetree with new Root Port function number assignment */ +static void pch_pcie_device_set_func(int index, int pci_func) +{ + device_t dev; + unsigned new_devfn; + + dev = rpc.ports[index]; + + /* Set the new PCI function field for this Root Port. */ + rpc.new_rpfn &= ~RPFN_FNMASK(index); + rpc.new_rpfn |= RPFN_FNSET(index, pci_func); + + /* Determine the new devfn for this port */ + new_devfn = PCI_DEVFN(PCH_DEV_SLOT_PCIE, pci_func); + + if (dev->path.pci.devfn != new_devfn) { + printk(BIOS_DEBUG, + "PCH: PCIe map %02x.%1x -> %02x.%1x\n", + PCI_SLOT(dev->path.pci.devfn), + PCI_FUNC(dev->path.pci.devfn), + PCI_SLOT(new_devfn), PCI_FUNC(new_devfn)); + + dev->path.pci.devfn = new_devfn; + } +} + +static void pcie_enable_clock_gating(void) +{ + int i; + int enabled_ports = 0; + + for (i = 0; i < rpc.num_ports; i++) { + device_t dev; + int rp; + + dev = rpc.ports[i]; + rp = root_port_number(dev); + + if (!dev->enabled) { + /* Configure shared resource clock gating. */ + if (rp == 1 || rp == 5 || rp == 6) + pcie_update_cfg8(dev, 0xe1, 0xc3, 0x3c); + + pcie_update_cfg8(dev, 0xe2, ~(3 << 4), (3 << 4)); + pcie_update_cfg(dev, 0x420, ~(1 << 31), (1 << 31)); + + /* Per-Port CLKREQ# handling. */ + if (gpio_is_native(18 + rp - 1)) + pcie_update_cfg(dev, 0x420, ~0, (3 << 29)); + + /* Enable static clock gating. */ + if (rp == 1 && !rpc.ports[1]->enabled && + !rpc.ports[2]->enabled && !rpc.ports[3]->enabled) { + pcie_update_cfg8(dev, 0xe2, ~1, 1); + pcie_update_cfg8(dev, 0xe1, 0x7f, 0x80); + } else if (rp == 5 || rp == 6) { + pcie_update_cfg8(dev, 0xe2, ~1, 1); + pcie_update_cfg8(dev, 0xe1, 0x7f, 0x80); + } + continue; + } + + enabled_ports++; + + /* Enable dynamic clock gating. */ + pcie_update_cfg8(dev, 0xe1, 0xfc, 0x03); + pcie_update_cfg8(dev, 0xe2, ~(1 << 6), (1 << 6)); + pcie_update_cfg8(dev, 0xe8, ~(3 << 2), (2 << 2)); + + /* Update PECR1 register. */ + pcie_update_cfg8(dev, 0xe8, ~0, 1); + pcie_update_cfg8(dev, 0x324, ~(1 << 5), (1 < 5)); + + /* Per-Port CLKREQ# handling. */ + if (gpio_is_native(18 + rp - 1)) + pcie_update_cfg(dev, 0x420, ~0, (3 << 29)); + + /* Configure shared resource clock gating. */ + if (rp == 1 || rp == 5 || rp == 6) + pcie_update_cfg8(dev, 0xe1, 0xc3, 0x3c); + } + + if (!enabled_ports) + pcie_update_cfg8(rpc.ports[0], 0xe1, ~(1 << 6), (1 << 6)); +} + +static void root_port_commit_config(void) +{ + int i; + + /* If the first root port is disabled the coalesce ports. */ + if (!rpc.ports[0]->enabled) + rpc.coalesce = 1; + + /* Perform clock gating configuration. */ + pcie_enable_clock_gating(); + + for (i = 0; i < rpc.num_ports; i++) { + device_t dev; + u32 reg32; + + dev = rpc.ports[i]; + + if (dev == NULL) { + printk(BIOS_ERR, "Root Port %d device is NULL?\n", i+1); + continue; + } + + if (dev->enabled) + continue; + + printk(BIOS_DEBUG, "%s: Disabling device\n", dev_path(dev)); + + /* Ensure memory, io, and bus master are all disabled */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 &= ~(PCI_COMMAND_MASTER | + PCI_COMMAND_MEMORY | PCI_COMMAND_IO); + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* Disable this device if possible */ + pch_disable_devfn(dev); + } + + if (rpc.coalesce) { + int current_func; + + /* For all Root Ports N enabled ports get assigned the lower + * PCI function number. The disabled ones get upper PCI + * function numbers. */ + current_func = 0; + for (i = 0; i < rpc.num_ports; i++) { + if (!rpc.ports[i]->enabled) + continue; + pch_pcie_device_set_func(i, current_func); + current_func++; + } + + /* Allocate the disabled devices' PCI function number. */ + for (i = 0; i < rpc.num_ports; i++) { + if (rpc.ports[i]->enabled) + continue; + pch_pcie_device_set_func(i, current_func); + current_func++; + } + } + + printk(BIOS_SPEW, "PCH: RPFN 0x%08x -> 0x%08x\n", + rpc.orig_rpfn, rpc.new_rpfn); + RCBA32(RPFN) = rpc.new_rpfn; +} + +static void root_port_mark_disable(device_t dev) +{ + /* Mark device as disabled. */ + dev->enabled = 0; + /* Mark device to be hidden. */ + rpc.new_rpfn |= RPFN_HIDE(PCI_FUNC(dev->path.pci.devfn)); +} + +static void root_port_check_disable(device_t dev) +{ + int rp; + + /* Device already disabled. */ + if (!dev->enabled) { + root_port_mark_disable(dev); + return; + } + + rp = root_port_number(dev); + + /* Is the GbE port mapped to this Root Port? */ + if (rp == rpc.gbe_port) { + root_port_mark_disable(dev); + return; + } + + /* Check Root Port Configuration. */ + switch (rp) { + case 2: + /* Root Port 2 is disabled for all lane configurations + * but config 00b (4x1 links). */ + if ((rpc.strpfusecfg1 >> 14) & 0x3) { + root_port_mark_disable(dev); + return; + } + break; + case 3: + /* Root Port 3 is disabled in config 11b (1x4 links). */ + if (((rpc.strpfusecfg1 >> 14) & 0x3) == 0x3) { + root_port_mark_disable(dev); + return; + } + break; + case 4: + /* Root Port 4 is disabled in configs 11b (1x4 links) + * and 10b (2x2 links). */ + if ((rpc.strpfusecfg1 >> 14) & 0x2) { + root_port_mark_disable(dev); + return; + } + break; + } + + /* Check Pin Ownership. */ + switch (rp) { + case 1: + /* Bit 0 is Root Port 1 ownership. */ + if ((rpc.pin_ownership & 0x1) == 0) { + root_port_mark_disable(dev); + return; + } + break; + case 2: + /* Bit 2 is Root Port 2 ownership. */ + if ((rpc.pin_ownership & 0x4) == 0) { + root_port_mark_disable(dev); + return; + } + break; + case 6: + /* Bits 7:4 are Root Port 6 pin-lane ownership. */ + if ((rpc.pin_ownership & 0xf0) == 0) { + root_port_mark_disable(dev); + return; + } + break; + } +} + +static void pcie_update_cfg8(device_t dev, int reg, u8 mask, u8 or) +{ + u8 reg8; + + reg8 = pci_read_config8(dev, reg); + reg8 &= mask; + reg8 |= or; + pci_write_config8(dev, reg, reg8); +} + +static void pcie_update_cfg(device_t dev, int reg, u32 mask, u32 or) +{ + u32 reg32; + + reg32 = pci_read_config32(dev, reg); + reg32 &= mask; + reg32 |= or; + pci_write_config32(dev, reg, reg32); +} + +static void pcie_add_0x0202000_iobp(u32 reg) +{ + u32 reg32; + + reg32 = pch_iobp_read(reg); + reg32 += (0x2 << 16) | (0x2 << 8); + pch_iobp_write(reg, reg32); +} + +static void pch_pcie_early(struct device *dev) +{ + config_t *config = dev->chip_info; + int do_aspm = 0; + int rp = root_port_number(dev); + + switch (rp) { + case 1: + case 2: + case 3: + case 4: + /* + * Bits 31:28 of b0d28f0 0x32c register correspnd to + * Root Ports 4:1. + */ + do_aspm = !!(rpc.b0d28f0_32c & (1 << (28 + rp - 1))); + break; + case 5: + /* + * Bit 28 of b0d28f4 0x32c register correspnd to + * Root Ports 4:1. + */ + do_aspm = !!(rpc.b0d28f4_32c & (1 << 28)); + break; + case 6: + /* + * Bit 28 of b0d28f5 0x32c register correspnd to + * Root Ports 4:1. + */ + do_aspm = !!(rpc.b0d28f5_32c & (1 << 28)); + break; + } + + /* Allow ASPM to be forced on in devicetree */ + if (config && (config->pcie_port_force_aspm & (1 << (rp - 1)))) + do_aspm = 1; + + printk(BIOS_DEBUG, "PCIe Root Port %d ASPM is %sabled\n", + rp, do_aspm ? "en" : "dis"); + + if (do_aspm) { + /* Set ASPM bits in MPC2 register. */ + pcie_update_cfg(dev, 0xd4, ~(0x3 << 2), (1 << 4) | (0x2 << 2)); + + /* Set unique clock exit latency in MPC register. */ + pcie_update_cfg(dev, 0xd8, ~(0x7 << 18), (0x7 << 18)); + + /* Set L1 exit latency in LCAP register. */ + pcie_update_cfg(dev, 0x4c, ~(0x7 << 15), (0x4 << 15)); + + switch (rp) { + case 1: + pcie_add_0x0202000_iobp(0xe9002440); + break; + case 2: + pcie_add_0x0202000_iobp(0xe9002640); + break; + case 3: + pcie_add_0x0202000_iobp(0xe9000840); + break; + case 4: + pcie_add_0x0202000_iobp(0xe9000a40); + break; + case 5: + pcie_add_0x0202000_iobp(0xe9000c40); + pcie_add_0x0202000_iobp(0xe9000e40); + pcie_add_0x0202000_iobp(0xe9001040); + pcie_add_0x0202000_iobp(0xe9001240); + break; + case 6: + /* Update IOBP based on lane ownership. */ + if (rpc.pin_ownership & (1 << 4)) + pcie_add_0x0202000_iobp(0xea002040); + if (rpc.pin_ownership & (1 << 5)) + pcie_add_0x0202000_iobp(0xea002240); + if (rpc.pin_ownership & (1 << 6)) + pcie_add_0x0202000_iobp(0xea002440); + if (rpc.pin_ownership & (1 << 7)) + pcie_add_0x0202000_iobp(0xea002640); + break; + } + + pcie_update_cfg(dev, 0x338, ~(1 << 26), 0); + } + + /* Enable LTR in Root Port. */ + pcie_update_cfg(dev, 0x64, ~(1 << 11), (1 << 11)); + pcie_update_cfg(dev, 0x68, ~(1 << 10), (1 << 10)); + + pcie_update_cfg(dev, 0x318, ~(0xffff << 16), (0x1414 << 16)); + + /* Set L1 exit latency in LCAP register. */ + if (!do_aspm && (pci_read_config8(dev, 0xf5) & 0x1)) + pcie_update_cfg(dev, 0x4c, ~(0x7 << 15), (0x4 << 15)); + else + pcie_update_cfg(dev, 0x4c, ~(0x7 << 15), (0x2 << 15)); + + pcie_update_cfg(dev, 0x314, 0x0, 0x743a361b); + + /* Set Common Clock Exit Latency in MPC register. */ + pcie_update_cfg(dev, 0xd8, ~(0x7 << 15), (0x3 << 15)); + + pcie_update_cfg(dev, 0x33c, ~0x00ffffff, 0x854c74); + + /* Set Invalid Recieve Range Check Enable in MPC register. */ + pcie_update_cfg(dev, 0xd8, ~0, (1 << 25)); + + pcie_update_cfg8(dev, 0xf5, 0x3f, 0); + + if (rp == 1 || rp == 5 || rp == 6) + pcie_update_cfg8(dev, 0xf7, ~0xc, 0); + + /* Set EOI forwarding disable. */ + pcie_update_cfg(dev, 0xd4, ~0, (1 << 1)); + + /* Set something involving advanced error reporting. */ + pcie_update_cfg(dev, 0x100, ~((1 << 20) - 1), 0x10001); + pcie_update_cfg(dev, 0x100, ~0, (1 << 29)); + + /* Read and write back write-once capability registers. */ + pcie_update_cfg(dev, 0x34, ~0, 0); + pcie_update_cfg(dev, 0x40, ~0, 0); + pcie_update_cfg(dev, 0x80, ~0, 0); + pcie_update_cfg(dev, 0x90, ~0, 0); +} + +static void pch_pcie_init(struct device *dev) +{ + u16 reg16; + u32 reg32; + + printk(BIOS_DEBUG, "Initializing PCH PCIe bridge.\n"); + + /* Enable SERR */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 |= PCI_COMMAND_SERR; + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* Enable Bus Master */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 |= PCI_COMMAND_MASTER; + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* Set Cache Line Size to 0x10 */ + pci_write_config8(dev, 0x0c, 0x10); + + reg16 = pci_read_config16(dev, 0x3e); + reg16 &= ~(1 << 0); /* disable parity error response */ + reg16 |= (1 << 2); /* ISA enable */ + pci_write_config16(dev, 0x3e, reg16); + +#ifdef EVEN_MORE_DEBUG + reg32 = pci_read_config32(dev, 0x20); + printk(BIOS_SPEW, " MBL = 0x%08x\n", reg32); + reg32 = pci_read_config32(dev, 0x24); + printk(BIOS_SPEW, " PMBL = 0x%08x\n", reg32); + reg32 = pci_read_config32(dev, 0x28); + printk(BIOS_SPEW, " PMBU32 = 0x%08x\n", reg32); + reg32 = pci_read_config32(dev, 0x2c); + printk(BIOS_SPEW, " PMLU32 = 0x%08x\n", reg32); +#endif + + /* Clear errors in status registers */ + reg16 = pci_read_config16(dev, 0x06); + pci_write_config16(dev, 0x06, reg16); + reg16 = pci_read_config16(dev, 0x1e); + pci_write_config16(dev, 0x1e, reg16); +} + +static void pch_pcie_enable(device_t dev) +{ + /* Add this device to the root port config structure. */ + root_port_init_config(dev); + + /* Check to see if this Root Port should be disabled. */ + root_port_check_disable(dev); + + /* Power Management init before enumeration */ + if (dev->enabled) + pch_pcie_early(dev); + + /* + * When processing the last PCIe root port we can now + * update the Root Port Function Number and Hide register. + */ + if (root_port_is_last(dev)) + root_port_commit_config(); +} + +static void pcie_set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ + /* NOTE: This is not the default position! */ + if (!vendor || !device) + pci_write_config32(dev, 0x94, pci_read_config32(dev, 0)); + else + pci_write_config32(dev, 0x94, (device << 16) | vendor); +} + +static struct pci_operations pcie_ops = { + .set_subsystem = pcie_set_subsystem, +}; + +static struct device_operations device_ops = { + .read_resources = pci_bus_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_bus_enable_resources, + .init = pch_pcie_init, + .enable = pch_pcie_enable, + .scan_bus = pciexp_scan_bridge, + .ops_pci = &pcie_ops, +}; + +static const unsigned short pcie_device_ids[] = { + /* Lynxpoint-LP */ + 0x9c10, 0x9c12, 0x9c14, 0x9c16, 0x9c18, 0x9c1a, + /* WildcatPoint */ + 0x9c90, 0x9c92, 0x9c94, 0x9c96, 0x9c98, 0x9c9a, 0x2448, + 0 +}; + +static const struct pci_driver pch_pcie __pci_driver = { + .ops = &device_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .devices = pcie_device_ids, +}; |